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A089848 as a simple table

na(n)
01
11
22
32
45
515
642
7132
8431
91430
104862
1116801
1258786
13208012
14742914
152674440
169694845
1735357712
18129644790
19477638700
201767263322
216564120420
2224466267020
2391482564069
24343059613650
251289904147324
264861946402882
2718367353072152

[1,1,2,2,5,15,42,132,431,1430,4862,16801,58786,
 208012,742914,2674440,9694845,35357712,129644790,
 477638700,1767263322,6564120420,24466267020,
 91482564069,343059613650,1289904147324,
 4861946402882,18367353072152]